Boiler furnace



Oct. 28. W24.

(5. s. KENT BOILER FURNACE 2 Sheets-Sheet. 1

Original Filed April 2. i921 G. S. KENT BOILER FURNACE Original FiledApril 2. 1921 2 She'ts-Sheet. 2'

Patented Oct. 28, 1924..

GEORGE S. KENT, 0'5 BUFFALO, NEW YORK.

BOILER FURNACE.

Original application filled April 2, 1921. Serial No. 458,087. Dividedand this application filed February 1, 1923. Serial No. 616,378. 7

To all whom it may canoe Mi.

Be it known that I, GEORGE S. KENT, a citi zen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented a new and useful improvement in Boiler Furnaces, of which thefollowing is a specification.

This invention relates to boiler furnaces.

The objects of the invention are to pro vide a furnace having improveddraft means whereby a more perfect combustion of the fuel is obtained,and further, to provide im provements in boiler furnaces in the otherrespects hereinafter described and claimed.

The invention as illustrated, is embodied in a boiler furnace of thetype shown in my application for patent Serial No. 458,067 filed April2, 1921, of which this application is a division, but it is to beunderstood that the invention of this present application is not limitedto a. furnace of this particular type but is adapted for use inconnection with other types of furnaces and other boiler structures.

In the accompanying, drawings:

Fig. 1 is a front elevation of a boiler furnace embodying the invention.

Fig. 2 is a sectional elevation thereof.

Fig. 3 is a fragmentary horizontal sect-ion thereof on line 3-3, Fig. 2.

Fig. 4 is an elevation of a portion of one of the inner walls thereof.

A represents a boiler furnace having side walls B and C respectively,and a front wall D. E represents a fire tube boiler mounted in thefurnace and F are water tubes forming substantially vertical watergrates at opposite sides of a central combustion space H designateshorizontal fire supporting grates and I are suitable water drums ortubular headers connecting the water tubes F, the lower water drums orheaders being connected with the boiler by means of risers K. Ldesignates refractory spacing blocks or fire bricks which close thespace between the upper water drums and the boiler.

M designates a pair of fuel doors disposed at opposite sides of thefurnace front, through which fuel is supplied to the grates and throughwhich air may be admitted above the fuel on said grates, and Ndesignates a pair of cleanout and draft doors through which access maybe had to the ash pits O. P designates a pair of doors which doorspermit access to the grates to allow the customary use of slicing barsor'similar de vices, and R designates a door opening into a central orauxiliary ash pit S.

This invention provides means for introduring a ventilating fluid or airor other combustion supporting fluid into the sides of the masses offuelupon the grates for the purpose of promoting the combustion of suchfuel, preferably in such manner that the air or other fluid sointroduced is forced to travel through the mass of fuel into which it isintroduced before it reaches the combustion space. In the preferredmeans for accomplishing this object, illustrated, the side walls of thefurnace are provided with con duits or passage-ways 10 which extendsubstantially lengthwise of the boiler and which may be formed, asshown, by the introduction of a channel beam 11 into a suitable recessin each of the side walls of the furnace. Each conduit 10 is open at oneend and the admission of air or other fluid thereto is controlled bysuitable means, such for example as a door 12 or the like. Theseconduits or passage-ways are in communication with the fire chambers andthe masses of fuel upon the grates through a suitable number of airadmission or draft openings13 whereby air is admitted from the airconduits directly into the sides fuel on the grates. Inthe preferredform illustrated, these; draft or air admission openings preferablytaper from the inner sides of the side walls to the air or draftconduits 10, that is to say, the openings are provided with enlargedmouths whereby air passing into the fuel from the air conduits is causedto spread out and diffuse as it enters the mass of fuel. As bestillustrated in Fig. 2 of the drawings, these draft openings preferablyextend inwardly and downwardly which prevents to a certain extent thefilling of these openings with ashes or other obstructions.

The introduction in this manner of air into the sides of the. masses offuel upon the grates encourages a very complete com-,

bustion, it initiates and maintains a draft of air through the entiremass of fuel from side to side, effectively carrying the unconsumedgases out into the central combustion space where they are consumed, andby supplying air to the heated fuel at all times renders the gases asthey are formed more susceptible to perfect combustion and ofthe massesof the results in the effective and most intimate admixture necessary tocause complete combustion of the gases and smokeless operation of theboiler.

I claim as my invention:

1. in a boiler furnace in combination with ,a housing having side wallsand a relatively central combustion space, a pair of grates, one at eachside of said central combustion space, and means in the side walls ofsaid housing for introducing air laterally into the masses of fuelsupported on said whereby the air from said means passes laterallythrough the masses of fuel into thecombustion space.

2, in a boiler furnace in combination with a housing having side wallsand a relatively central combustion space, a pair of grates, one at eachside of said central combustion space, an air conduit arranged in eachof said side walls lengthwise of the boiler, and air inlet passages fromsaid conduit into said-furnace adapted to supply air directly to thesides of masses of fuel on said grates flt'tllQ sides thereof remotefrom said coinbustion space.

3. In a boiler furnace in combination with a housing having side wallsand a relatively central combustion space, a pair of grates, one at eachside of said central combustion space, an air conduit arranged in eachof said side walls lengthwise of the boiler, and air inlet passages fromsaid conduit into said furnace adapted to supply a directly to the sidesof masses of fuel on said grates, said air inlet passages extendinglengthwise of the furnace and tapering outwardly toward said conduit.

boilerfurnace in combination with side walls and a relatively l. Ina

a housing having central combustion space, a pair of grates,

one at each side of said central combustion space, an air conduitarranged in each of said side walls lengthwise of the boiler, and airinlet passages from said conduit into said furnace adapted to supply airdirectly tothe sides of masses of fuel on said grates,

said air inlet passages extending inwardly and downwardly from saidconduit and having their discharge openings extending lengthwise of thefurnace.

5. In a boiler furnace in combination with a housing having side wallsand a relatively central combustion space, a pairyof grates, one at eachside of said central combustion space, an air conduit arranged in each,of said side walls lengthwise of the boiler,- and air inlet passagesfrom said conduit into said furnace adapted to supply air directly lothe sides of masses of fuel on said grates, said air inlet passagesextending inwardly and downwardly from said conduit and the dischargeends of said passages being of greater dimension lengthwise of thefurnace than the other ends thereof.

6. in a boiler furnace having a central combs. tion space, thecombination of a pair of grates spaced apart and extending lengthwisebeneath the boiler and adapted to support masses of fuel, means forintroducing air above and below said grates, and means for introducingair into the sides of masses of fuel supported on said grates oppositeto said combustion space.

'7. In a boiler furnace having a central combustion space beneath theboiler, the combination of a pair of grates forsupporting masses of fuelat opposite sides of said combustion space, and means for introducingair into the sidesof said masses of fuel opposite said combustion space,whereby the air is forced to travel laterally through said masses offuel to reach said combustion space.

E. in a boiler furnace-having a central combustion space "beneath theboiler, the combination of a pair of grates for supporting masses offuel atopposite sides of said combustion space, and means for diffusingair into the sides of said masses of fuel upon said grates opposite tosaid combustion space.

GEORGE S. KENT.

